PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2821Cup,tapered Roller Bearing

The Timken Corporation · NSN 3110-01-386-3691 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-01-386-3691 — this item is cataloged by the U.S. Government under National Stock Number 3110-01-386-3691. Primary manufacturer part number: 2821.
Features
  • Cup,tapered Roller Bearing — FSC 3110
  • Outside Diameter: 2.8750 INCHES NOMINAL IN
  • Backface Corner Radius: 0.0310 INCHES NOMINAL IN
  • Style Designator: NORMAL ANGLE
  • Material: STEEL OVERALL
  • 1 verified cross-reference
  • Primary manufacturer: The Timken Corporation
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Overall construction
General Description

The Cup,tapered Roller Bearing, cataloged under National Stock Number 3110-01-386-3691, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is The Timken Corporation. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3110-01-386-3691
Primary Part Number2821
Item NameCup,tapered Roller Bearing
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerThe Timken Corporation
StatusACTIVE
Outside Diameter2.8750 INCHES NOMINAL IN
Backface Corner Radius0.0310 INCHES NOMINAL IN
Style DesignatorNORMAL ANGLE
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6680-00-106-86702821 INTERCHANGEABLE
Indicator,rate of Flow
Clark-Reliance Llc Dba Jacoby-Tarbox
6760-00-116-2126 INTERCHANGEABLE
Cord,expand-0-Cap
5330-00-122-9957 INTERCHANGEABLE
Packing,preformed
2530-00-488-8313305-P INTERCHANGEABLE
Parts Kit,hydraulic Brake Master
Motive Parts Co of America Inc
6920-00-674-6674 INTERCHANGEABLE
Fairing Assy,tail
5935-00-679-03857703729P2 INTERCHANGEABLE
Backshell,electrical Connector
Lockheed Martin Corporation Div Rms
5365-01-154-58702821 INTERCHANGEABLE
Retaining Ring
Lawler Manufacturing Company, Inc.
6145-01-220-642111464489 INTERCHANGEABLE
Cable,special Purpose,electrical
Us Army Aviation and Missile Command
5935-01-315-09212821 INTERCHANGEABLE
Connector,plug,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
5930-01-397-7315 INTERCHANGEABLE
Switch,push
Cross-Reference Index
Part NumberManufacturer
2821 PRIMARY The Timken Corporation (USA)
Related Parts
6680-00-106-8670INTERCHANGEABLE
INDICATOR,RATE OF FLOW
2821
6760-00-116-2126INTERCHANGEABLE
CORD,EXPAND-0-CAP
5330-00-122-9957INTERCHANGEABLE
PACKING,PREFORMED
2530-00-488-8313INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE MASTER
305-P
6920-00-674-6674INTERCHANGEABLE
FAIRING ASSY,TAIL
5935-00-679-0385INTERCHANGEABLE
BACKSHELL,ELECTRICAL CONNECTOR
7703729P2
5365-01-154-5870INTERCHANGEABLE
RETAINING RING
2821
6145-01-220-6421INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
11464489
5935-01-315-0921INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
2821
5930-01-397-7315INTERCHANGEABLE
SWITCH,PUSH
5365-01-566-2036INTERCHANGEABLE
BUSHING,NONMETALLIC
2821

Frequently Asked Questions

What is NSN 3110-01-386-3691?

NSN 3110-01-386-3691 is a Cup,tapered Roller Bearing, manufactured by The Timken Corporation, classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-01-386-3691?

NSN 3110-01-386-3691 has 1 cross-referenced part number: 2821 (The Timken Corporation).

What NSN replaces 3110-01-386-3691?

There are 11 known substitutes for 3110-01-386-3691: 6680-00-106-8670, 6760-00-116-2126, 5330-00-122-9957 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2821?

Key specifications for 2821: Outside Diameter: 2.8750 INCHES NOMINAL IN; Backface Corner Radius: 0.0310 INCHES NOMINAL IN; Style Designator: NORMAL ANGLE; Material: STEEL OVERALL. 5 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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